The aim of the tiberCAD project is to provide an integrated multiscale and multiphysics simulation environment capable of coupling different models on different scales in a unified and transparent way.
Usually, the active part of a device, which needs quantum mechanical approaches, is small compared to the overall simulation domain.
The computational cost of the more accurate quantum mechanical models however forbids their application to the whole device.
It is therefore necessary to adopt a multiscale simulation approach which couples the semi-classical models describing the surroundings of the active region to the continuous or atomistic quantum models acting only on the nanostructured parts of the device.
Possible applications of tiberCAD range from nanoelectronics to laser technologies including molecular electronics and bio-devices.
The tool is currently under intense development. Here is a brief description of the features of tiberCAD project.
- Tools for creating geometric structures for TCAD simulation, including an extensive material database.
- 1D/2D/3D modeling and meshing (structured and not ), cylindrical symmetry.
- support for external meshing tools (GMSH)
- built-in atomistic structure generation tool: coupling to the geometric model, several crystal lattices (cubic, hexagonal, fcc, bcc), hydrogen passivation model.
Quantum, classical, atomistic and continuous descriptions can be used in different regions of a device/nanostructure within the same simulation; analysys and optimization may be performed at all the relevant scale lengths, possibly including self-consistent behaviour.
- Strain/stress modelization, including pyro- and piezoelectric effects, non-linear strain, converse piezoelectric, external forces
- Classical (Drift-Diffusion, hydrodynamic) particle transport and Poisson
calculation, Quantum Current calculation (quantum drift-diffusion,
Non-Equilibrium Green Function)
- Electrons, holes and excitons dynamic
- Heat balance model: electron and hole dissipation, microscopical heat model
- Quantum physics for continuous media, including Envelope Function Approximation, k.p theory.
- Atomistic quantum description, including Empirical Tight-Binding model and ab-initio methods
- Electromagnetic solver for optical fields
- Electronic devices analysis and design (HEMT, MOSFET, BJT,etc)
- Nanoelectronic devices (nanoMOSFET, NW-FET, etc.)
- Molecular and Organic electronics devices (OTFT, OLED, OPV)
- Optoelectronic Devices (LASER, LED, Photodetectors)
- Solar Cells (silicon based, CIGS, DSSC, organic)
- Nanostructures (quantum wells, quantum dot, III/V heterostructures)